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Saturday, September 18, 2021

Global warming vs whitewash: Whether we may control increasing temperature of Earth?

Scientists are working on various ways to find out the solution to cool the rapidly warming Earth. But the big question is, can global warming really be stopped, or is it just an illusion? 

The temperature rises significantly during the summer in many cities of India like Chennai, Jaisalmer, Udaipur, Jodhpur, and other countries like New York, etc., the temperature observed more than 5 degrees Celcius compared to the surrounding areas. This is because dark roofs, roads, and sidewalks become hotter than areas where there are trees and plants. 

[Purely white painted home]

We already have a solution for this problem. That is to paint houses and roofs white. As easy as it sounds, it is also cheap. Its effect is also visible. A white roof is about 30 - 35% cooler than a black roof. It has long been a part of the architecture in African, Arab, and Southern European countries to reduce heat. By doing this, the local temperature can be reduced by an average of 1 to 5 degrees Celsius. 

Obviously, this is an average number. Its effect can be seen more in the summer days. Under the Cool Roofs initiative in New York City, more than 1 million square meters of rooftops in the city have been painted white since 2009. 

Painting white not only makes the house and surrounding areas cooler but also saves energy. People living in these houses have to reduce the use of air conditioners. Scientists estimate that if all roofs and sidewalks around the world were painted white, it could reduce greenhouse gas emissions up to an extent.

Save Earth, Save Environment...  

 

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